In the future, medical science has solved the problem of aging, humans are immortal. The problem is that, everyone eventually becomes friends with everyone else, therefore the whole world becomes like a little village where everyone knows each other. So, the most precious thing in the world is a stranger. They are very rare. These underground clubs are set up, whose organizers put together people who don’t know each other. In these clubs, strangers can be together, but they have to obey one rule: they’re not allowed to speak or communicate in any way, they have to remain unknown. So, the greatest pleasure of immortals is to be with unknown immortals for a little while, on a saturday night, and not talk.